Herein, we report a reductive hydrazo-sulfonylative difunctionalization
cascade of alkynyl cyclohexadienones employing PhTeTePh as an uncommon
reducing agent. Diphenyl ditelluride is a commercially available solid
with a good solubility profile in most organic solvents, and this
is the first report illustrating it as a reducing agent. The protocol
afforded a variety of difunctionalized dihydrochromenones and dihydrobenzofuranones
in good yields under relatively mild conditions. The reactions were
scalable, and mechanistic studies were conducted to probe the reaction
mechanism. Additionally, photophysical studies of the products were
carried out, which revealed that they had significant absorption (400–450
nm) and emission (520–570 nm) in the visible region.
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